I a i illn



(No Model.)

T. CAHILL.

ORGAN.

No. 345,028. Paten-ted July 6, 1886.

-fm1/@a N PETERS, PhawLumgnpmr, wnhngkun, D. C.

llivrren Stains PATENT @tirreno 'll'llOTHY CAHILL, OF SAME PLA CE.

ORGAN.

Application llloll August 1l, Se

345,028, lated July 6,1896.

.il Ko. ITLSSU, (No molel.)

Be it known that l, TimnnncsCanna., a citizen ot the United States, residing at Oberlin, in the county of Lorain and State ol' Ohio, have invented a new and useful improvement in Organs and all other Keyed Vvlind Instruments Similar thereto. For this invention l have received no Letters Patent, and ot' it the following is a specification.

The object ot' my invention is to give to organs and similar instruments the capability oi" varying their tones in loudness in accordance with the touch of the fingers upon the keys; and my invention consists in governing the loudness ot' the tones of organs and similarinstruments by valve mechanism so constructed and combined with the keys ofsaid instruments as to regulate the Vllow ol' wind end vibrations from the tone producers in accordance with the rapidity with which the keys are depressed, and while l have devised many mechanismsby which my invention can be carried into ell'ect, l do not -limit myself to any particularl i'orrns and details of mechanism, as my invention does not consist solely in such things, but is the first application to an' organ ot' mechanism whereby its loudness ot' tone can be governed in all degrees of piano and forte by and in accordance with the stroke upon the keys.

I have not considered it necessary to describe or draw the frame, bellows, stops, reeds, and other parts ol cabinet-organs, since l change them in no respect; but l have represented and. described only those parts which are intimately connected with my invention.

lVith reference to the accompanying drawings, Figure l is a plan view of the wind-chest, showing it inits position with reference to the keys of a common instrument,theright half of the 'ligure being in horizontal section, with the cover ofthe chest removed, so as to show my mechanism. Fig. 2 is a side elevation in scction of my device, showing the different parts in position when the linger-keyis at rest Figl 3 is a side elevation in section through the valve-chest, showing the parts as in position when the key has been gently depressed, Fig. 4 is a view similar to the preceding, showing theposition of the pianoforte wind-valve when the key has been depressed by a stron g stroke,

To describe my invention willi reference to the accompanying d rawings,the val ve-ehest A is beneath the linger-keys l) l2 l, which, are similar to those in ordinary use, or may be of any other desirable pattern. A number of movable pins, C C C, one for every key ofthe instrument, pass through the top of the windchest A and projectabove it, having their npper ends immediately under the keys B B B, se that when any one of the linger-keys is depressed it depresses at the same time one of the pins tl C C. wWithin the valve chest A cach one ol' the pins C C t) has two circular ilange-likc projections, G/ and C, and below the lower ilange-like projection, U2, isaspiral spring, C. Between the ilange like projec tions il and Cf is the end of the pianoforte wind valve D. 'lhere are as many of these pianoforte wind-valves as there are keys, and they are all set upon the' rod E, which rod is suitably supported by the projections F F F ot' the valvechest A. Each ol" thepiano-forte wind-val ves D D D covers a port or wind hole, ll, in the lower part oli' the valvechest A. From this windhole D in thelower part ofthe valvechcst fr the wind, which has been supplied to the valve-chest A l'roin any suitable sonrce,passes through any suitable passages to the reeds or other tone-producers. The pianoforte wind-val D D l.) are balanced upon the rod E, and are pressed at one end by the leversprings G G G, so that said piano forte wind-valves will stay in whatever position they may be thrown by the finger-keys B B B, acting through theintervention ofthe flange-furnished pins C C C. New, when one of the movable pins C C is depressed by the corresponding finger key, B, above it, the upper ilange-like projection, C, when it has almost reached its lowest position, strikes the balanced piano-forte wind-valve l),whose inomentuin causes it to move ott its seat Dl and open the p'ort D more or less, in proportion to the force of the stroke upon the corresponding linger-key, opening said valve but very little if the stroke upon thenger-key Bisvery soft, as in Fig. 3, but opening it to its lull extentif the stroke is verystrongorheavy, asin Fig. 4. rlthe pianoforte wind-valve D isheld thusopen by the spring G- until the key B in rising re- IOO the tone-producers admitted by the valve Dv varies with the force of the stroke upon the corresponding linger-key; andsince in cabinet-l organs and similar wind instrumentstheloudness of tone depends, other things being equal,- upon the amount of wind admitted to thet0nc producers, the loudness of tone is varied inv accordance with thetouch upon thekcys. Thus by my improvement the same power of having the tone varied in loudness according to the touch which the piano-forte possesses is given to the cabinet-organ and similar instruments,

in which, unlike the piano-forte, the tones can` sisting of the doublehanged tracker-pin C,

be sustained at pleasure.

While I have ldescribed my invention with reference to the finger-keys of the.manuals,.it. is obvious that it may also bc used with pedalsV in pedal instruments in exactly the same man-- ner as it is used with theinger-keys.

It is obvious that instead of' applying the Avalve mechanism herein described, or its valves may be joined together, so as to act at the same time. By any suitable connector.

just as many slats of a swell are joined together by one connectingpiece.

Idesire it to'be understood, therefore,'that held open in vclaim as my invention, and desire to secure by Letters Patent, -is

1. In an organ or other similarinstrument,

'valve mechanism constructed and arranged substantially as herein described, consisting of the double-flanged tracker-pin C, valve D, and lever-spring G,or their equivalents,\vhere by the ilow of wind or vibrations from the toneproducers is governed by and in accordance with the rapidity with which the key is depressed.

2. The combination ot' the keys of'organs lwith valve mechanism constructed and arranged substantially as herein described, convalve D, "and leverspring G, or their'equivalents, whereby the dow ol wind or vibrations from the tone-prod ncers is governed by and in accordance with the rapidity with which said finger-keys are depressed.

'3. In an organ, the combination of the valve D with the double-flanged tracker-pin'C, or

the equivalent thereof, whereby the amplitude ol' motion of said valve D is governed by and said trackenpin C, or the equivalent thereof.

4. In an organ, the combination of the valve D with the leverspring G, constructed and ar ranged substantially as shown, or the equivalent thereof,whereby said valve' is caught and any position in which it may be thrown.

THADDEUS CAHILL.

'lVitnessesr HoMER JOHNSON, GEO. W. WAITE.

y-infaccordance with the rapidity of motion of 

